Thomas p



(No Model.)

T. P. HARDY.

STEAM RADIATOR.

Patented Jan. 17,18 82'.

WWW v: a u a @H gnphnr. Washington. D. c.

NITED STATES THOMAS P. HARDY, on NEW YORK, N. Y.

STEAM-RADIATOR.

SPECIFICATION forming part of Letters Patent No. 252,580, dated January 17, 1882.

Application filed November 526, 1881. (No model.)

To all whom it may concern:

Be it known that I, THOMAS P. HARDY, a citizen of the United States, residing at New York, in the county and State of New York, have invented new and useful Improvements in Steam-Radiators, of which the following is a specification.

This invention relates to an improvement on the radiator-tubes which I have described in Letters Patent No. 216,400, granted to me June 10, 1879, and which consists of two chambers through which the steam passes up, and a narrow channel through Whll'll the steam passes down. My new tube is formed with three chambers through which the steam passes up, and two chambers through which the steam passes down, as hereinafter more fully described.

This invention is illustrated in the accompanying drawings, in which Figure 1 represents a sectional elevation of a steam-radiator constructed according to my invention, Fig. 2 is a horizontal section of one of the radiating-tubes on a larger scale than the previous figure. Fig. 3 is a longitudinal section of the same in the plane 0000, Fig. 2. Fig. 4 is a similar section in the plane y y, Fig. 2.

Similar letters indicate corresponding parts.

In the drawings, the letterA designates my radiating-tube, which is preferably made of cast-iron, and which is open at its foot and closed at its top. On one side of said'tube is formed a deep depression, a, and at right angles, or nearly so, to said depression a are two depressions, I) 1). (Best seen in Fig. 2.) These several depressions commence near the open foot of the tube, and they terminate within a short distance of the closed top, thereby forming a chamber, 0, at the top, and three chambers, d 6], at the sides of the tube, while two open channels, 9 g, extend from the upper chamber, 0, down to the open foot. The radiating-tubes A are secured in a base, B, of the ordinary construction, and if steam is admitted to the same it passesup through the chambers d efinto the upper chamber, 0, and down through the channels 9 9, between the depression to and the depressions I) 1), thereby creating a circulation which materially increases the heating capacity of my radiator. Furthermore, by providing the tubes with the depressions a b 1) their radiating-surfaces are increased, and a radiator is obtained which produces a superior heating effect with com paratively little expenditure of steam.

What I claim as new, and desire to secure by Letters Paten t, is-

A metallic 'radiatingtube formed in one piece and provided with three longitudinal depressions, a b I), which commence near the open foot and terminate within a short distance from the closed top thereof, leaving two channels, g g, a steam-chamber, c, at the top, and three chambers, d e f, extending from the upper steam-chamber downto the open foot, the chamberscandfcommunicating with the chamher at by the channels 9 g, substantially in the manner and for the purpose set forth.

In testimony whereof I have hereunto set my hand and seal in the presence of two subscribing witnesses.

THos. P. HARDY. [L.s.]

Witnesses:

W. HAUFF, E. F. KASIENHUBER. 

